function dimensions(id,maxwidth,maxheight)
{
	object = document.getElementById(id);
	
	if(object.complete == true && object.width > 0 && object.height > 0)
	{
		var widthratio = object.width/maxwidth;
		var heightratio = object.height/maxheight;
		
		if(widthratio > heightratio || heightratio == widthratio)
		{
			object.style.width = maxwidth;
			object.style.height = "auto";
		}
		
		if(heightratio > widthratio || heightratio == widthratio)
		{
			object.style.height = maxheight;
			object.style.width = "auto";
		}
		
		clearInterval(object.timer);
	}
}